Types of tongue infection
Thrush is the one most people mean. A yeast that lives harmlessly in many mouths overgrows and forms creamy white patches that can be wiped off, leaving a red, sore surface. It tends to follow antibiotics, inhaled steroids, diabetes, a dry mouth or wearing dentures overnight. Our guide on white tongue separates thrush from a harmless coating.
Viral infections show up as small blisters that break into painful ulcers. Herpes simplex is the usual culprit, and hand, foot and mouth disease does the same in children. They run their course, and the guide on herpetic ulcers in the mouth explains the pattern.
Bacterial infection is less common on the tongue itself but can set in after a deep bite, a burn, a tongue piercing or a broken tooth edge that keeps cutting the same spot. It looks like a swollen, tender, red area, sometimes with pus or a bad taste.
| Type | Usual look | Usually treated by |
|---|---|---|
| Thrush (yeast) | Creamy white patches that wipe off, red sore skin beneath, burning | Antifungal treatment prescribed by a dentist or doctor |
| Viral (herpes, hand foot and mouth) | Small blisters turning into painful ulcers, sometimes with fever | Rest, fluids and soothing care; a doctor advises on anything more |
| Bacterial | Tender, swollen, red area, pus or a bad taste, often after a cut or piercing | Examination; a dentist or doctor decides if prescription treatment is needed |
How common tongue infections tend to look. General information to help you describe symptoms, not a diagnosis.
What to do while you wait to be seen
Keep the mouth clean with gentle brushing and warm salt water rinses. Drink plenty of fluids, avoid very hot, spicy or acidic food, and stop tobacco and paan, which irritate an infected tongue and slow healing. Clean dentures daily and leave them out at night if thrush is suspected.
Widely available paracetamol, taken as directed on the label, can ease pain for most adults. Ask a pharmacist or doctor first if you have liver disease, drink alcohol regularly or take other medicines.
Do not take leftover antibiotics. They do nothing for thrush or viral sores and can make thrush worse. A dentist or doctor prescribes antibiotics only when a bacterial infection is spreading.
Swelling under the tongue is different
Infection in the floor of the mouth, under the tongue, usually starts from a tooth, often a lower back tooth or wisdom tooth. It causes swelling under the tongue or below the jaw, pain on swallowing, a tongue pushed upward and difficulty opening the mouth. This can spread quickly to the neck and affect the airway.
Treat that as same-day care, and go to a hospital emergency department if swallowing or breathing is affected. The same applies to spreading facial swelling or fever. Our page on face swelling due to tooth infection describes why dental infections should not be watched at home, and the general mouth infection guide lists the wider signs.
When a tongue sore is not an infection
Not every sore tongue is infected. Sharp teeth, biting, deficiencies and aphthous ulcers all cause tongue soreness without an infection, and the inflamed tongue guide covers those. Any sore, lump or patch that has not healed in three weeks needs examining whatever it looks like, as the mouth ulcers page explains.
Common questions
How do I know if my tongue is infected?
Look for pain that is getting worse, white patches, blisters, pus, a bad taste, swelling or fever. A dentist or doctor can tell thrush, a viral sore and a bacterial infection apart by examining you. Do not guess and start medicines on your own.
Does a tongue infection go away on its own?
Viral sores usually heal by themselves in one to two weeks. Thrush and bacterial infections generally need treatment and a look at the cause, such as dentures, a dry mouth or a sharp tooth. Anything lasting beyond a couple of weeks should be examined.
Can a tongue piercing cause infection?
Yes. A piercing creates an open wound in a mouth full of bacteria, and swelling, pus, fever or a hot, tender tongue are signs of trouble. It can also chip teeth and irritate gums. See a dentist or doctor promptly if the area looks infected.
When is swelling under the tongue an emergency?
Swelling under the tongue or below the jaw, especially with fever or pain on swallowing, needs same-day care. If you struggle to swallow, open your mouth or breathe, go to a hospital emergency department straight away.
About this page
This page is general information, not a diagnosis or a quotation. Prices are prevailing Lucknow market ranges. Your own treatment and cost are determined after an examination. For questions about your own case, call +91 83036 12717.